They talked about ROOM ESCAPE MAKER:

"It's a free way to help hone your ability to ensnare helpless people in locked rooms filled with diabolical mechanisms." - Jay Is Games

"I introduced the project to my class... And I've never seen them so excited about a class project before! At the end of the class I almost couldn't get them to leave: They just wanted to keep talking about ideas for puzzles." - A school teacher